18447650493 has 16 divisors (see below), whose sum is σ = 24953361216. Its totient is φ = 12120451200.

The previous prime is 18447650443. The next prime is 18447650497. The reversal of 18447650493 is 39405674481.

It is a happy number.

It is not a de Polignac number, because 18447650493 - 2⁹ = 18447649981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18447650497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252546 + ... + 317292.

It is an arithmetic number, because the mean of its divisors is an integer number (1559585076).

Almost surely, 2^18447650493 is an apocalyptic number.

It is an amenable number.

18447650493 is a deficient number, since it is larger than the sum of its proper divisors (6505710723).

18447650493 is a wasteful number, since it uses less digits than its factorization.

18447650493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66124.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 18447650493 in words is "eighteen billion, four hundred forty-seven million, six hundred fifty thousand, four hundred ninety-three".